Stockholders' Equity - Warrant activity (Details) - $ / shares
6 Months Ended 12 Months Ended
Dec. 31, 2019
Jun. 30, 2019
Non-vested, Ending balance 1,885,000  
Exercisable 1,885,000  
Warrant [Member]    
Non-vested, Beginning balance 1,885,000  
Granted 0  
Exercised 0  
Expired/Cancelled 0  
Non-vested, Ending balance 1,885,000 1,885,000
Exercisable 1,885,000 1,885,000
Outstanding, Beginning balance Weighted Average Exercise Price $ 1.25  
Granted Weighted Average Exercise Price 0.00  
Exercised Weighted Average Exercise Price 0.00  
Expired/Cancelled Weighted Average Expired Price 0.00  
Outstanding, Ending Balance Weighted Average Exercise Price 1.25 $ 1.25
Exercisable, Weighted Average Exercise Price $ 1.25 $ 1.25